conditional not working in \setuphead

conditional not working in \setuphead

[Pablo Rodriguez]

Dear list,

I have the following sample:

  \startbuffer[demo]
  <doc>
    <section id="section-i1">
      <text>first</text>
    </section>
    <section id="section-i2">
      <text>second</text>
    </section>

  </doc>
  \stopbuffer

  \startxmlsetups xml:initialize
     \xmlsetsetup{#1}{doc|section}{xml:*}
  \stopxmlsetups

  \xmlregistersetup{xml:initialize}

  \startxmlsetups xml:doc
     \xmlflush{#1}
  \stopxmlsetups

  \startxmlsetups xml:section
     \startsection[title={\xmlatt{#1}{id}},
        beforesection={\doif{\xmlatt{#1}{id}}{\selectedtopic}
            {conditional}}]
        \xmlflush{#1}
        \doif{\xmlatt{#1}{id}}{\selectedtopic}{conditional}
     \stopsection
  \stopxmlsetups

  \def\selectedtopic{section-i1}

  \starttext
     \xmlprocessbuffer{main}{demo}{}
  \stoptext

How can I make the conditional in the beforesection option work?

Many thanks for your help,

Pablo
--
http://www.ousia.tk
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Re: conditional not working in \setuphead

[Wolfgang Schuster]

Pablo Rodriguez schrieb am 20.04.2020 um 18:55:
> Dear list,
> 
> I have the following sample:
> 
>    \startbuffer[demo]
>    <doc>
>      <section id="section-i1">
>        <text>first</text>
>      </section>
>      <section id="section-i2">
>        <text>second</text>
>      </section>
> 
>    </doc>
>    \stopbuffer
> 
>    \startxmlsetups xml:initialize
>       \xmlsetsetup{#1}{doc|section}{xml:*}
>    \stopxmlsetups
> 
>    \xmlregistersetup{xml:initialize}
> 
>    \startxmlsetups xml:doc
>       \xmlflush{#1}
>    \stopxmlsetups
> 
>    \startxmlsetups xml:section
>       \startsection[title={\xmlatt{#1}{id}},
>          beforesection={\doif{\xmlatt{#1}{id}}{\selectedtopic}
>              {conditional}}]
>          \xmlflush{#1}
>          \doif{\xmlatt{#1}{id}}{\selectedtopic}{conditional}
>       \stopsection
>    \stopxmlsetups
> 
>    \def\selectedtopic{section-i1}
> 
>    \starttext
>       \xmlprocessbuffer{main}{demo}{}
>    \stoptext
> 
> How can I make the conditional in the beforesection option work?

The argument of the beforesection-key is placed before ConTeXt stores 
the values of \startsection which means you can do it this way.

What you can do here is to put whatever something in a macro before you 
call \startsection and access the value of this macro with the 
beforesection-key. You should ensure the content if this temporary macro 
is cleared when your conditional is false.

\setuphead
   [section]
   [beforesection=\getvariable{xml}{beforesection}]

\startxmlsetups xml:section

     \doifelse{\xmlatt{#1}{id}}{\selectedtopic}
         {\setvariable{xml}{beforesection}{conditional}}
         {\setvariable{xml}{beforesection}{}}

     \startsection[title={\xmlatt{#1}{id}}]
         \xmlflush{#1}
     \stopsection

\stopxmlsetups

Wolfgang
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___________________________________________________________________________________

Re: conditional not working in \setuphead

[Pablo Rodriguez]

On 4/20/20 7:23 PM, Wolfgang Schuster wrote:
> [...]
> The argument of the beforesection-key is placed before ConTeXt stores
> the values of \startsection which means you can do it this way.
>
> What you can do here is to put whatever something in a macro before you
> call \startsection and access the value of this macro with the
> beforesection-key. You should ensure the content if this temporary macro
> is cleared when your conditional is false.
>
> \setuphead
>    [section]
>    [beforesection=\getvariable{xml}{beforesection}]
>
> \startxmlsetups xml:section
>
>      \doifelse{\xmlatt{#1}{id}}{\selectedtopic}
>          {\setvariable{xml}{beforesection}{conditional}}
>          {\setvariable{xml}{beforesection}{}}
>
>      \startsection[title={\xmlatt{#1}{id}}]
>          \xmlflush{#1}
>      \stopsection
>
> \stopxmlsetups

Many thanks for your help, Wolfgang.

Your sample works perfectly fine.

Pablo
--
http://www.ousia.tk
___________________________________________________________________________________
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maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://context.aanhet.net
archive  : https://bitbucket.org/phg/context-mirror/commits/
wiki     : http://contextgarden.net
___________________________________________________________________________________